You can if you have an Androide cell phone. The App is called "tcallBlocking". There is a free version in which you can block up to 3 ph. numbers and then a full version that costs $2.00, allowing you to block unlimited numbers. I just bought the full version to use the wild card. By using the wildcard, you can block an entire area code by entering <206*>.
I have been getting the same calls from various different "206" area code numbers, so I found this App and it has been working for me.
...a little after 7am [PDT] here, and another call from 206 496 0957. I too called right back, several times, and the same automated [British female] voice telling me the same message ‘to call later’.
I dialed the ATT operator, and she graciously advised that I call the business office when they open, and file that report of harassment and ask their advice of what action to take. She was understanding, and wished me "good luck".
This "caller" is dialing my other cell phone, which is on CDT, so I suppose who ever the offending party is, they are supposedly within their rights, as in that time zone it is past 9am local time. Nevertheless, it is ongoing, I consider it harassment; it is even more so that I am not able to reach someone in order to ask what they want from me, and to request my "do not call" order be observed.
Let me assure y'all that I will follow through after 9am this morning to A] call the local ATT business office and put forth my 'case'. I am 79 years young, and B] I am being bothered earlier than I care to, and C] I have plenty of time to write my Gov'ment, the PUC, and the rest of the alphabet and make a courteous, controlled 'stink' demonstrating even temperament, and aplomb; being however firm in my complaint!
Y’all pee and moan on these forums, but I fear that only 1:200 will actually follow through with a written complaint. So the calls will continue, our Gov’ment will continue to laugh at us, and waste our money on more important matters, e.g. bailing out poor business practices to the tune of hundreds of billions of dollars meanwhile turning a deaf [forgive me, hearing impaired] ear to ‘our issues’ in real time.
This telephone number has called several times. Leaves no message. Nobody answers when I dial back. I've seen an uptick in this pattern. Every day I receive between 1-3 calls from a variety of cul-de-sac telephone lines, no messages left. Hmph.